USGS Water-Year Summary 2020
15300300 ILIAMNA RIVER NEAR PEDRO BAY, AK
LOCATION - Lat 59°45'31", long 153°50'41" referenced to North American Datum of 1927, in NE 1/4 SE 1/4 sec.10, T.5 S., R.27 W., Lake and Peninsula Borough, AK, Hydrologic Unit 19030206, (Iliamna D-3 quad), on left downstream side of bridge, at mile 4 on Williamsport Road, 9.2 mi east of Pedro Bay, and 37 mi east of Iliamna.
DRAINAGE AREA - 129 mi².
- WRD AK-04-1: 1998-2001, 2003 (Instantaneous maximum discharge).
PERIOD OF RECORD - May 1996 to current year.
GAGE - Water-stage recorder. Elevation of gage is 80 ft above mean sea level, from topographic map.
PERIOD OF RECORD - October 2013 to current year.
PERIOD OF DAILY RECORD - WATER TEMPERATURE: October 2013 to current year.
INSTRUMENTATION - Electronic water-temperature recorder set for 15-minute recording interval.
EXTREMES FOR PERIOD OF RECORD - WATER TEMPERATURE: Maximum, 16.1°C, August 16, 2019; minimum, 0.0°C, many days during winter.
EXTREMES FOR PERIOD OF DAILY RECORD - WATER TEMPERATURE: Maximum Daily Mean, 14.7°C, August 16, 2019; Minimum Daily Mean, 0.0°C on many days during winter periods.